/* VideoZoomHandler.m
 *
 * Copyright (C) 2012  Belledonne Comunications, Grenoble, France
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or   
 *  (at your option) any later version.                                 
 *                                                                      
 *  This program is distributed in the hope that it will be useful,     
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of      
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the       
 *  GNU Library General Public License for more details.                
 *                                                                      
 *  You should have received a copy of the GNU General Public License   
 *  along with this program; if not, write to the Free Software         
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */ 

#import "VideoZoomHandler.h"
#include "linphonecore.h"
#import "LinphoneManager.h"

@implementation VideoZoomHandler

- (void)zoomInOut:(UITapGestureRecognizer*) reco {
    if (zoomLevel != 1)
        zoomLevel = 1;
    else
        zoomLevel = 2;
    
    if (zoomLevel != 1) {
        CGPoint point = [reco locationInView:videoView];
        cx = point.x / videoView.frame.size.width;
        cy = 1 - point.y / videoView.frame.size.height;
    } else {
        cx = cy = 0.5;
    }
    linphone_call_zoom_video(linphone_core_get_current_call([LinphoneManager getLc]), zoomLevel, &cx, &cy);
}

- (void)videoPan:(UIPanGestureRecognizer*) reco {
    if (zoomLevel <= 1.0)
        return;
    
    float x,y;
    CGPoint translation = [reco translationInView:videoView];
    if ([reco state] == UIGestureRecognizerStateEnded) {
        cx -= translation.x / videoView.frame.size.width;
        cy += translation.y / videoView.frame.size.height; 
        x = cx;
        y = cy;
    } else if ([reco state] == UIGestureRecognizerStateChanged) {
        x = cx - translation.x / videoView.frame.size.width;
        y = cy + translation.y / videoView.frame.size.height; 
        [reco setTranslation:CGPointMake(0, 0) inView:videoView];
    } else {
        return;
    }
    
    linphone_call_zoom_video(linphone_core_get_current_call([LinphoneManager getLc]), zoomLevel, &x, &y);
    cx = x;
    cy = y;
}

- (void)pinch:(UIPinchGestureRecognizer*) reco {
    float s = zoomLevel;
    // CGPoint point = [reco locationInView:videoGroup];
    // float ccx = cx + (point.x / videoGroup.frame.size.width - 0.5) / s;
    // float ccy = cy - (point.y / videoGroup.frame.size.height - 0.5) / s;
    if ([reco state] == UIGestureRecognizerStateEnded) {
        zoomLevel = MAX(MIN(zoomLevel * reco.scale, 3.0), 1.0);
        s = zoomLevel;
        // cx = ccx;
        // cy = ccy;
    } else if ([reco state] == UIGestureRecognizerStateChanged) {
        s = zoomLevel * reco.scale;
        s = MAX(MIN(s, 3.0), 1.0);
    } else if ([reco state] == UIGestureRecognizerStateBegan) {
        
    } else {
        return;
    }
    
    
    linphone_call_zoom_video(linphone_core_get_current_call([LinphoneManager getLc]), s, &cx, &cy);
}

- (void)resetZoom {
    zoomLevel = 1;
    cx = cy = 0.5;
}

- (void)setup: (UIView*) view {
    videoView = view;
    
    UITapGestureRecognizer* doubleFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(zoomInOut:)];
    [doubleFingerTap setNumberOfTapsRequired:2];
    [doubleFingerTap setNumberOfTouchesRequired:1];
    [videoView addGestureRecognizer:doubleFingerTap];

    UIPanGestureRecognizer* pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(videoPan:)];
    [videoView addGestureRecognizer:pan];
    UIPinchGestureRecognizer* pinchReco = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];
    [videoView addGestureRecognizer:pinchReco];    

    [doubleFingerTap release];
    [pan release];
    [pinchReco release];
    
    [self resetZoom];
}

@end
